It is not a part of AIX. Get it here: http://www.bullfreeware.com/ .
The AIX 5.1 version works on 5.2. I had to download two files because there is a prerequisite library I didn't have.
libpcap-0.6.1.0
nmap-2.53.0.0
They are .exe files and when you run them they'll extract .bff. Install using smitty and use.
When done the command to use is 'nmap -P0 -sT localhost'.

I'd like to re-visit this topic=2E I'm trying to start an Informix instance; when I attempt to bring the engine on-line, it is complaining about not being able to bind to the port I defined for it in /etc/services=2E Is there a way to "reset" or "clear" a port?

Thanks Lamar. I had assumed (I know, don't assume) if the engine did
not start, no processes owned by informix would bind to a port; I
checked for open processes and there was one process owned by informix;
I deleted the process and the engine started without a problem.

I should have made the connection between "netstat -a" telling me
informix had bound a port and that the informix process was using that
port; delete the process bound to the port and Viola, the port is
"cleared".

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